设计开发了一种新型的犁切/挤压刀具，通过滚压－ 犁切/挤压复合成形技术，在不锈钢管外表面加工出三维整体翅片．翅片形成分为两个过程: 首先滚压出V 型沟槽，然后通过犁切/挤压在V 型沟槽上生成三维整体翅片．实验分析了不同滚压条件下形成的沟槽形貌，以及不同犁切/挤压条件下形成的三维整体外翅片形貌; 并探讨了犁切/挤压深度、进给量对翅片高度、翅片间距的影响．结果表明: 当滚压深度为1. 20 mm、犁切/挤压深度为0. 25 ～ 0. 45mm、进给量为2. 16 ～ 3. 92mm/r 时，可以在不锈钢管外表面加工出性能最优的三维整体翅片．

In this paper,a novel plowing /extrusion tool is proposed to develop a new compound forming technique of rolling-plowing /extrusion to machine outside 3-dimension integral fins on stainless steel tubes. The machining process is divided into two stages: to fabricate V-ribs by rolling and to machine 3-dimension integral fins on the V-ribs by plowing /extrusion. Moreover,the morphologies of the ribs and the fins under different processing conditions were experimentally analyzed,and the effect of the plowing /extrusion depth and feed rate on the fin height and pitch were investigated. The results show that the optimal fins are machined at a rolling depth of 1. 20mm,a plowing/extrusion depth of 0. 25 ～ 0. 45mm and a feed rate of 2. 16 ~3. 92mm/r.